Disposable cup with straight rib



FIG. 1 is a perspective view of a disposable cup with straight rib showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a side view thereof;

FIG. 4 is a top view thereof; and,

FIG. 5 is a bottom view thereof. 

We claim the ornamental design for a disposable cup with straight rib, as shown and described. 